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Water system · PWSID CA4010025

SLO CSA NO. 10 - CAYUCOS WTP

SAN LUIS OBISPO, CA

Check your exact address → SAN LUIS OBISPO overview
100
Excellent
PurityRadar safety score

PWSID

CA4010025

State

California

City

SAN LUIS OBISPO

Population served

—

Primary source

Surface water

Score history

No change since tracking began Jun 18, 2026.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 100

2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.

PFAS & contaminant readings

No PFAS detections are on record for this system from EPA’s UCMR5 monitoring (2023–25). Absence of a detection isn’t a guarantee — not every system was sampled, and this dataset doesn’t cover other contaminants.

Violations & enforcement

3

Violations on record

0

Unaddressed

2

Health-based

4

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jan 2019. Official EPA record →

Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Oct 2004 Resolved
Monitoring & reporting · Total coliform began Oct 1996 Resolved
Treatment technique · EPA contaminant 0200 health-based began Jul 1993 Resolved

Recent enforcement actions

  • State action · SOX Jan 2019
  • State action · SOX Apr 2005
  • State action · SFL Mar 2005
  • State action · SOX Jan 1993

This profile is built from EPA public records for system CA4010025 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.